Borg Warner Corp
Borg WarneActive Patents
0
Total Holdings
190
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| DE2245701A1 | DIFFERENTIAL FOR MOTOR VEHICLES | Expired / Lapsed | 1972-09-18 | — | 0 | Details |
| GB868544A | Gear pumps | Expired / Lapsed | 1958-01-10 | — | 0 | Details |
| US4786220A | Cutting tool wear monitor | Expired / Lapsed | 1987-05-26 | 1988-11-22 | 10 | Details |
| US4522371A | Proportional solenoid valve | Expired / Lapsed | 1983-06-20 | 1985-06-11 | 6 | Details |
| US4465738A | Wettable coatings for inorganic substrates | Expired / Lapsed | 1983-06-15 | 1984-08-14 | 14 | Details |
| US4428812A | Rapid rate reactive sputtering of metallic compounds | Expired / Lapsed | 1983-04-04 | 1984-01-31 | 10 | Details |
| USRE31361E | Variable pulley transmission | Expired / Lapsed | 1982-04-23 | 1983-08-30 | 14 | Details |
| US4103753B1 | US4103753B1 - - Google Patents | Expired / Lapsed | 1977-01-25 | 1982-02-23 | 0 | Details |
| US4303149A | Clutch driven plate with spline locking hub | Expired / Lapsed | 1980-04-03 | 1981-12-01 | 10 | Details |
| US4241618A | Variable pulley transmission | Expired / Lapsed | 1979-03-02 | 1980-12-30 | 15 | Details |
| US4189960A | Underdrive transmission with sun gear and carrier slidable … | Expired / Lapsed | 1977-11-15 | 1980-02-26 | 5 | Details |
| US4065936A | Counter-flow thermoelectric heat pump with discrete sections | Expired / Lapsed | 1976-06-16 | 1978-01-03 | 10 | Details |
| US3900277A | Rotary compressor | Expired / Lapsed | 1974-02-04 | 1975-08-19 | 2 | Details |
| US3828877A | Differential for four-wheel drive | Expired / Lapsed | 1973-07-18 | 1974-08-13 | 19 | Details |
| US3748928A | Control system for mutiple driving axle vehicle | Expired / Lapsed | 1971-09-20 | 1973-07-31 | 23 | Details |
| US3698772A | Brake control system for pulsing vehicle brakes at variable… | Expired / Lapsed | 1970-03-18 | 1972-10-17 | 23 | Details |
| US3670235A | Motor control system with compensation for low-frequency va… | Expired / Lapsed | 1970-09-25 | 1972-06-13 | 11 | Details |
| US3656573A | Plural output path torque transmitting mechanism with slip … | Expired / Lapsed | 1969-06-05 | 1972-04-18 | 7 | Details |
| US3649140A | Oil metering system for rotary compressor | Expired / Lapsed | 1970-05-11 | 1972-03-14 | 5 | Details |
| US3620804A | Metal plating of thermoplastics | Expired / Lapsed | 1969-01-22 | 1971-11-16 | 6 | Details |
| US3599639A | Portable suction pump system | Expired / Lapsed | 1969-08-20 | 1971-08-17 | 8 | Details |
| US3594623A | Ac motor control system with anticogging circuit | Expired / Lapsed | 1970-03-13 | 1971-07-20 | 10 | Details |
| US3594630A | Commutation circuit for scr{3 s | Expired / Lapsed | 1969-11-06 | 1971-07-20 | 15 | Details |
| US3584279A | Motor control system with volts/hertz regulation | Expired / Lapsed | 1969-05-28 | 1971-06-08 | 11 | Details |
| US3581561A | Engine acceleration horsepower-metering system | Expired / Lapsed | 1969-10-27 | 1971-06-01 | 13 | Details |
| US3558239A | Power steering back-up pressure system | Expired / Lapsed | 1969-06-25 | 1971-01-26 | 0 | Details |
| US3482157A | Demodulator for controlling motor torque angle to stabilize… | Expired / Lapsed | 1967-11-06 | 1969-12-02 | 0 | Details |
| US3480204A | Lubrication system for rotary compressor | Expired / Lapsed | 1968-03-26 | 1969-11-25 | 0 | Details |
| US3407748A | Blood circulating apparatus | Expired / Lapsed | 1967-02-17 | 1968-10-29 | 0 | Details |
| US3398889A | Control system for air conditioners and the like | Expired / Lapsed | 1966-01-24 | 1968-08-27 | 0 | Details |
| US3389381A | Communication system | Expired / Lapsed | 1966-01-18 | 1968-06-18 | 2 | Details |
| US3384209A | Modulated fluid clutch in series with fluid coupling | Expired / Lapsed | 1966-03-24 | 1968-05-21 | 0 | Details |
| US3358334A | Plastic working machine impelling material to be worked aga… | Expired / Lapsed | 1967-01-30 | 1967-12-19 | 2 | Details |
| US3319907A | Belt retracting means | Expired / Lapsed | 1964-01-10 | 1967-05-16 | 1 | Details |
| US3312387A | Lubrication system for rotary compressor | Expired / Lapsed | 1964-12-30 | 1967-04-04 | 0 | Details |
| US3308371A | Static inverter system with energy return circuit | Expired / Lapsed | 1963-05-31 | 1967-03-07 | 2 | Details |
| US3283236A | Control system for power units such as electric motors and … | Expired / Lapsed | 1965-09-30 | 1966-11-01 | 1 | Details |
| US3280657A | Transmission apparatus | Expired / Lapsed | 1963-04-22 | 1966-10-25 | 2 | Details |
| US3278727A | Digital frequency selector | Expired / Lapsed | 1963-11-25 | 1966-10-11 | 2 | Details |
| US3270846A | Friction member with friction material | Expired / Lapsed | 1961-04-10 | 1966-09-06 | 2 | Details |
| US3265900A | Tape reader with input clipping circuit including photosens… | Expired / Lapsed | 1962-12-03 | 1966-08-09 | 1 | Details |
| US3258198A | Rotary compressor | Expired / Lapsed | 1964-06-04 | 1966-06-28 | 2 | Details |
| US3255593A | Thermoelectric system | Expired / Lapsed | 1964-05-06 | 1966-06-14 | 2 | Details |
| US3223922A | Voltage regulator circuit | Expired / Lapsed | 1960-08-29 | 1965-12-14 | 2 | Details |
| US3177428A | Phase detector including capacitive averaging and mixing me… | Expired / Lapsed | 1959-10-30 | 1965-04-06 | 2 | Details |
| US3151783A | Fluid pressure actuated metering device | Expired / Lapsed | 1961-06-19 | 1964-10-06 | 2 | Details |
| US3150541A | Rear mounted transmission | Expired / Lapsed | 1961-11-16 | 1964-09-29 | 2 | Details |
| US3145734A | Pressure compensated flow control valve | Expired / Lapsed | 1961-10-06 | 1964-08-25 | 2 | Details |
| US3131545A | Control devices for thermoelectric means | Expired / Lapsed | 1962-08-29 | 1964-05-05 | 2 | Details |
| US3109298A | Refrigerating systems | Expired / Lapsed | 1962-04-02 | 1963-11-05 | 2 | Details |
| US3101200A | Sectional mechanical seal assembly | Expired / Lapsed | 1961-05-23 | 1963-08-20 | 2 | Details |
| US3091729A | Static inverter | Expired / Lapsed | 1959-03-06 | 1963-05-28 | 1 | Details |
| US3086632A | One-way roller clutch | Expired / Lapsed | 1961-10-10 | 1963-04-23 | 2 | Details |
| US3071725A | Linearizing system | Expired / Lapsed | 1956-11-30 | 1963-01-01 | 0 | Details |
| US3052833A | Polyphase static inverter | Expired / Lapsed | 1959-02-24 | 1962-09-04 | 0 | Details |
| US3038498A | Hydraulic amplifier | Expired / Lapsed | 1956-09-25 | 1962-06-12 | 0 | Details |
| US3033232A | Control valves | Expired / Lapsed | 1960-08-31 | 1962-05-08 | 0 | Details |
| US3026862A | Engine fuel supply cooler | Expired / Lapsed | 1960-09-06 | 1962-03-27 | 0 | Details |
| US3011606A | Roller clutch | Expired / Lapsed | 1957-07-26 | 1961-12-05 | 0 | Details |
| US3010189A | Carbon to aluminum bond | Expired / Lapsed | 1959-11-25 | 1961-11-28 | 2 | Details |
| US3000543A | Plug-in pump assembly | Expired / Lapsed | 1958-09-22 | 1961-09-19 | 0 | Details |
| US2992746A | Electro-mechanical manipulator | Expired / Lapsed | 1957-07-31 | 1961-07-18 | 0 | Details |
| US2978150A | Plug-in pump assembly | Expired / Lapsed | 1958-10-24 | 1961-04-04 | 0 | Details |
| US2969677A | Stress adjusting apparatus | Expired / Lapsed | 1955-09-30 | 1961-01-31 | 0 | Details |
| US2966690A | Peripherally stiffened pipe wiper | Expired / Lapsed | 1956-01-17 | 1961-01-03 | 0 | Details |
| US2959070A | Accessory drive | Expired / Lapsed | 1959-01-09 | 1960-11-08 | 0 | Details |
| US2953735A | Polyphase static inverter | Expired / Lapsed | 1958-06-30 | 1960-09-20 | 0 | Details |
| US2953164A | Multiple chamber valve plural motors | Expired / Lapsed | 1957-04-29 | 1960-09-20 | 0 | Details |
| US2949321A | Mechanical seal for liquid oxygen pump | Expired / Lapsed | 1957-01-28 | 1960-08-16 | 0 | Details |
| US2946416A | Hydraulic retarder control | Expired / Lapsed | 1959-01-07 | 1960-07-26 | 0 | Details |
| US2939557A | Transmission mechanism | Expired / Lapsed | 1955-11-07 | 1960-06-07 | 0 | Details |
| US2938362A | Multiple fluid refrigerating system | Expired / Lapsed | 1955-09-02 | 1960-05-31 | 0 | Details |
| US2933105A | Article handling and working apparatus | Expired / Lapsed | 1955-11-07 | 1960-04-19 | 0 | Details |
| US2930593A | Air conditioning systems | Expired / Lapsed | 1957-07-05 | 1960-03-29 | 0 | Details |
| US2928255A | Heat pump systems | Expired / Lapsed | 1957-04-04 | 1960-03-15 | 0 | Details |
| US2926543A | Transmission controls | Expired / Lapsed | 1955-11-17 | 1960-03-01 | 0 | Details |
| US2926247A | Linearizing indicating system | Expired / Lapsed | 1956-12-04 | 1960-02-23 | 0 | Details |
| US2909195A | Servo valve | Expired / Lapsed | 1958-03-24 | 1959-10-20 | 0 | Details |
| US2887766A | Composite metal articles | Expired / Lapsed | 1956-10-26 | 1959-05-26 | 2 | Details |
| US2882756A | Transmission | Expired / Lapsed | 1953-12-28 | 1959-04-21 | 0 | Details |
| US2881594A | Electrical refrigerating device | Expired / Lapsed | 1956-11-05 | 1959-04-14 | 0 | Details |
| US2877656A | Power steering devices | Expired / Lapsed | 1954-08-03 | 1959-03-17 | 0 | Details |
| US2853890A | Transmission | Expired / Lapsed | 1951-09-18 | 1958-09-30 | 0 | Details |
| US2847072A | Methods for dual completion of oil and gas wells | Expired / Lapsed | 1953-06-15 | 1958-08-12 | 0 | Details |
| US2845870A | Fuel booster pump | Expired / Lapsed | 1955-04-22 | 1958-08-05 | 0 | Details |
| US2845817A | Transmission controls | Expired / Lapsed | 1955-01-12 | 1958-08-05 | 0 | Details |
| US2815838A | One way clutch | Expired / Lapsed | 1953-04-27 | 1957-12-10 | 0 | Details |
| US2806672A | Turbine assembly | Expired / Lapsed | 1954-09-01 | 1957-09-17 | 0 | Details |
| US2780929A | Air cooled unit air conditioner | Expired / Lapsed | 1956-03-07 | 1957-02-12 | 0 | Details |
| US2775132A | Power steering mechanism | Expired / Lapsed | 1952-12-06 | 1956-12-25 | 0 | Details |
| US2757552A | Hydraulic controls for transmissions | Expired / Lapsed | 1948-12-30 | 1956-08-07 | 0 | Details |
| US2756851A | Clutch control system | Expired / Lapsed | 1952-10-22 | 1956-07-31 | 0 | Details |
| US2756681A | Pressure loaded pump | Expired / Lapsed | 1950-06-16 | 1956-07-31 | 0 | Details |
| US2752858A | Air turbine driven pump | Expired / Lapsed | 1950-07-01 | 1956-07-03 | 0 | Details |
| US2725762A | Transmission | Expired / Lapsed | 1951-04-14 | 1955-12-06 | 0 | Details |
| US2725890A | Hydraulic power control system | Expired / Lapsed | 1950-03-22 | 1955-12-06 | 0 | Details |
| US2720120A | Transmission | Expired / Lapsed | 1951-05-15 | 1955-10-11 | 0 | Details |
| US2711656A | Transmission | Expired / Lapsed | 1948-12-23 | 1955-06-28 | 0 | Details |
| US2711100A | Transmission | Expired / Lapsed | 1951-04-26 | 1955-06-21 | 0 | Details |
| US2700341A | Pump arrangement for operating automatic clutches | Expired / Lapsed | 1948-12-24 | 1955-01-25 | 0 | Details |
| US2695566A | Pump, bushing graduated pressure responsive areas | Expired / Lapsed | 1950-05-19 | 1954-11-30 | 0 | Details |
| US2693711A | Transmission | Expired / Lapsed | 1950-01-19 | 1954-11-09 | 0 | Details |
| US2691945A | Pressure loaded gear pump | Expired / Lapsed | 1950-08-30 | 1954-10-19 | 0 | Details |
| US2687928A | Transmission idler gear construction | Expired / Lapsed | 1950-04-29 | 1954-08-31 | 0 | Details |
| US2682787A | Braking system | Expired / Lapsed | 1951-12-12 | 1954-07-06 | 0 | Details |
| US2676548A | Pump | Expired / Lapsed | 1952-02-27 | 1954-04-27 | 0 | Details |
| US2671357A | Torque converter transmission | Expired / Lapsed | 1949-05-28 | 1954-03-09 | 0 | Details |
| US2670894A | Compressor | Expired / Lapsed | 1950-10-20 | 1954-03-02 | 0 | Details |
| US2665704A | Constant speed flow control valve | Expired / Lapsed | 1948-03-26 | 1954-01-12 | 0 | Details |
| US2665637A | Pumping system | Expired / Lapsed | 1947-05-07 | 1954-01-12 | 0 | Details |
| US2660958A | Pressure loaded gear pump | Expired / Lapsed | 1950-08-11 | 1953-12-01 | 0 | Details |
| US2657533A | Hydraulic control system | Expired / Lapsed | 1951-03-26 | 1953-11-03 | 0 | Details |
| US2642844A | Clutch piston safety valve | Expired / Lapsed | 1948-12-09 | 1953-06-23 | 0 | Details |
| US2624287A | Gear pump | Expired / Lapsed | 1949-10-08 | 1953-01-06 | 0 | Details |
| US2605622A | Spline joint | Expired / Lapsed | 1946-05-16 | 1952-08-05 | 0 | Details |
| US2593629A | Four-speed countershaft and planetary transmission | Expired / Lapsed | 1949-09-21 | 1952-04-22 | 0 | Details |
| US2582487A | Transmission | Expired / Lapsed | 1945-04-07 | 1952-01-15 | 0 | Details |
| US2579356A | Constant velocity joint | Expired / Lapsed | 1947-03-01 | 1951-12-18 | 0 | Details |
| US2572007A | Variable-speed and torque transmission mechanism | Expired / Lapsed | 1946-02-01 | 1951-10-23 | 0 | Details |
| US2550082A | Rotary turbine-type hydraulic torque converter | Expired / Lapsed | 1943-05-05 | 1951-04-24 | 0 | Details |
| US2548761A | Transmission interlock mechanism | Expired / Lapsed | 1947-03-26 | 1951-04-10 | 0 | Details |
| US2532462A | Compact power unit | Expired / Lapsed | 1945-08-22 | 1950-12-05 | 0 | Details |
| US2527941A | Pump-multiple piece bushing | Expired / Lapsed | 1948-05-22 | 1950-10-31 | 0 | Details |
| US2525805A | Tool slide | Expired / Lapsed | 1948-10-01 | 1950-10-17 | 0 | Details |
| US2519050A | Transmission control | Expired / Lapsed | 1944-10-21 | 1950-08-15 | 0 | Details |
| US2519022A | Power transmitting mechanism | Expired / Lapsed | 1944-04-10 | 1950-08-15 | 0 | Details |
| US2511539A | Five-speed transmission | Expired / Lapsed | 1947-10-09 | 1950-06-13 | 0 | Details |
| US2510362A | Seal | Expired / Lapsed | 1944-11-20 | 1950-06-06 | 0 | Details |
| US2505197A | Pump housing | Expired / Lapsed | 1949-04-12 | 1950-04-25 | 0 | Details |
| US2495988A | Transmission gearing | Expired / Lapsed | 1943-07-14 | 1950-01-31 | 0 | Details |
| US2492935A | Rotary blower with abrading rotor ends and abradable casing… | Expired / Lapsed | 1943-11-22 | 1949-12-27 | 0 | Details |
| US2491678A | Rotary blower with abrading casing end walls and abradable … | Expired / Lapsed | 1943-12-09 | 1949-12-20 | 0 | Details |
| US2487732A | Pump-pressure loaded-with unloading relief valve | Expired / Lapsed | 1948-02-19 | 1949-11-08 | 0 | Details |
| US2479359A | Unloading valve | Expired / Lapsed | 1943-10-06 | 1949-08-16 | 0 | Details |
| US2477247A | Relief valve | Expired / Lapsed | 1943-07-08 | 1949-07-26 | 0 | Details |
| US2473329A | Tail rotor for helicopters | Expired / Lapsed | 1944-12-15 | 1949-06-14 | 0 | Details |
| US2472031A | Pump with pressure loaded stepped bushing | Expired / Lapsed | 1946-07-31 | 1949-05-31 | 0 | Details |
| US2470355A | Pressure loaded gear pump | Expired / Lapsed | 1945-11-23 | 1949-05-17 | 0 | Details |
| US2466244A | Variable-speed transmission | Expired / Lapsed | 1944-05-18 | 1949-04-05 | 0 | Details |
| US2466206A | Transmission | Expired / Lapsed | 1943-03-08 | 1949-04-05 | 0 | Details |
| US2459361A | Torque responsive clutch | Expired / Lapsed | 1943-06-26 | 1949-01-18 | 0 | Details |
| US2449608A | Transmission and control therefor | Expired / Lapsed | 1943-03-08 | 1948-09-21 | 0 | Details |
| US2449586A | Transmission and control therefor | Expired / Lapsed | 1942-08-15 | 1948-09-21 | 0 | Details |
| US2444165A | Pump with pressure bushing | Expired / Lapsed | 1943-08-16 | 1948-06-29 | 0 | Details |
| US2437791A | Pump with unloading bushing | Expired / Lapsed | 1943-06-26 | 1948-03-16 | 0 | Details |
| US2433484A | Movable vane variable displacement pump | Expired / Lapsed | 1944-11-24 | 1947-12-30 | 0 | Details |
| US2433428A | Torque responsive clutch | Expired / Lapsed | 1943-06-26 | 1947-12-30 | 0 | Details |
| US2429489A | Unloading valve | Expired / Lapsed | 1943-08-23 | 1947-10-21 | 0 | Details |
| US2420315A | Booster pump shut-off casing for pump removal | Expired / Lapsed | 1944-05-11 | 1947-05-13 | 0 | Details |
| US2420622A | Pump with pressure loaded bushing | Expired / Lapsed | 1942-04-15 | 1947-05-13 | 0 | Details |
| US2415011A | Motor compressor assembly | Expired / Lapsed | 1942-09-18 | 1947-01-28 | 0 | Details |
| US2408336A | Transmission | Expired / Lapsed | 1943-01-08 | 1946-09-24 | 0 | Details |
| US2402033A | Piston ring seal | Expired / Lapsed | 1944-03-21 | 1946-06-11 | 0 | Details |
| US2399098A | Transmission | Expired / Lapsed | 1943-06-26 | 1946-04-23 | 0 | Details |
| US2397634A | Automatic transmission | Expired / Lapsed | 1943-10-19 | 1946-04-02 | 0 | Details |
| US2395459A | Automatic transmission | Expired / Lapsed | 1943-07-08 | 1946-02-26 | 0 | Details |
| US2393693A | One-way coupling device | Expired / Lapsed | 1944-05-03 | 1946-01-29 | 0 | Details |
| US2378353A | Fluid coupling | Expired / Lapsed | 1941-04-05 | 1945-06-12 | 0 | Details |
| US2369965A | Furnace | Expired / Lapsed | 1941-11-10 | 1945-02-20 | 0 | Details |
| US2368053A | Screen with plastic frame | Expired / Lapsed | 1943-01-27 | 1945-01-23 | 0 | Details |
| US2366646A | Multiengine drive | Expired / Lapsed | 1943-01-18 | 1945-01-02 | 0 | Details |
| US2360646A | Control mechanism for transmissions | Expired / Lapsed | 1942-01-09 | 1944-10-17 | 0 | Details |
| US2334402A | Transmission control | Expired / Lapsed | 1941-12-13 | 1943-11-16 | 0 | Details |
| US2332593A | Automatic transmission | Expired / Lapsed | 1941-01-04 | 1943-10-26 | 0 | Details |
| US2328092A | Fluid operated clutch | Expired / Lapsed | 1939-04-19 | 1943-08-31 | 0 | Details |
| US2328091A | Fluid operated clutch | Expired / Lapsed | 1938-09-30 | 1943-08-31 | 0 | Details |
| US2324733A | Transmission | Expired / Lapsed | 1940-12-02 | 1943-07-20 | 0 | Details |
| US2311209A | Planetary transmission | Expired / Lapsed | 1941-08-25 | 1943-02-16 | 0 | Details |
| US2286585A | Clutch control | Expired / Lapsed | 1940-09-18 | 1942-06-16 | 0 | Details |
| US2281118A | Rotor brake | Expired / Lapsed | 1940-11-22 | 1942-04-28 | 0 | Details |
| US2275204A | Fluid operated clutch | Expired / Lapsed | 1939-04-20 | 1942-03-03 | 0 | Details |
| US2271425A | Coupling | Expired / Lapsed | 1940-02-10 | 1942-01-27 | 0 | Details |
| US2263098A | Furnace | Expired / Lapsed | 1939-11-16 | 1941-11-18 | 0 | Details |
| US2255584A | Method of and apparatus for heat transfer | Expired / Lapsed | 1937-12-11 | 1941-09-09 | 0 | Details |
| US2252567A | Art of refrigeration | Expired / Lapsed | 1938-03-14 | 1941-08-12 | 0 | Details |
| US2251342A | Synchronizing free wheel transmission | Expired / Lapsed | 1932-06-13 | 1941-08-05 | 0 | Details |
| US2240340A | Stove | Expired / Lapsed | 1936-08-21 | 1941-04-29 | 0 | Details |
| US2235002A | Universal joint | Expired / Lapsed | 1937-12-04 | 1941-03-18 | 0 | Details |
| US2231966A | Transmission control | Expired / Lapsed | 1938-10-28 | 1941-02-18 | 0 | Details |
| US2204779A | Transmission | Expired / Lapsed | 1938-05-16 | 1940-06-18 | 0 | Details |
| US2200851A | Transmission synchronizer | Expired / Lapsed | 1938-10-03 | 1940-05-14 | 0 | Details |
| US2187169A | Stove | Expired / Lapsed | 1937-01-22 | 1940-01-16 | 0 | Details |
| US2172957A | Dual manifold equalizer | Expired / Lapsed | 1938-01-21 | 1939-09-12 | 0 | Details |
| US2146925A | Barrel chime construction | Expired / Lapsed | 1935-11-16 | 1939-02-14 | 0 | Details |
| US2115963A | Planetary gear drive | Expired / Lapsed | 1934-04-02 | 1938-05-03 | 0 | Details |
| US2109010A | Method of making laminated metal blanks | Expired / Lapsed | 1935-05-16 | 1938-02-22 | 0 | Details |
| US2107089A | Transmission mechanism | Expired / Lapsed | 1934-01-17 | 1938-02-01 | 0 | Details |
| US2070892A | Method of making weights for centrifugal clutches | Expired / Lapsed | 1933-07-27 | 1937-02-16 | 0 | Details |
| US2031067A | Automatic transmission | Expired / Lapsed | 1933-08-03 | 1936-02-18 | 0 | Details |
| US1963945A | Oil filter medium and method of making the same | Expired / Lapsed | 1931-01-02 | 1934-06-19 | 0 | Details |